12ct Diamond (Oval, 18.59×12.39mm, White) vs 4.5ct Diamond (Oval, 12×8mm, White)
Quick summary: When looked from above (face-up position), 12ct Diamond (18.59×12.39mm, oval cut) appears 2.4 times larger than 4.5ct Diamond (12×8mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 12ct Diamond (oval cut) |
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4.5ct Diamond (oval cut) |
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white |
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| 18.59×12.39 mm | 12×8 mm | |
| actual size | ||
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Actual size is set for screen
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Ring:
Skin tone:
Ring width: 3.0 mm
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64 mm |
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Actual sizes of
12ct Diamond Oval (18.59×12.39mm, White)
and
4.5ct Diamond Oval (12×8mm, White)
as they would appear on a ring and finger.
Adjust the ring and finger size to get an idea of how these gemstones would look on your finger.
Where to buy?
For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile
Face-up Size
The face-up size depends on the shape of the gem, its weight and the proportions of the cut. Face-up area is a measure of the size of the gem when viewed from above (as set in a ring).
It tells you how big the gem is at the girdle plane.
| 12 Ct Diamond (Oval) | 4.5 Ct Diamond (Oval) | |
| 18.59×12.39 mm | vs | 12×8 mm |
| 188.87 mm² | 78.72 mm² |
| 12ct Diamond Oval (18.59×12.39mm) | |
| 4.5ct Diamond Oval (12×8mm) | |
| Difference: 140% (110.15 mm²) |
12ct Diamond (Oval, 18.59×12.39mm) has approx. 140% more face-up area than 4.5ct Diamond (Oval, 12×8mm). In other words, it's 2.4x larger.
Popular comparisons:
- 12ct Diamond (Oval, White, 18.59 x 12.39) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 12ct Diamond (Oval, White, 18.59 x 12.39) vs. 13ct Diamond (Pear, White, 21.28 x 12.82)
- 12ct Diamond (Oval, White, 18.59 x 12.39) vs. 9ct Diamond (Oval, White, 16.88 x 11.25)
- 12ct Diamond (Oval, White, 18.59 x 12.39) vs. 4.5ct Diamond (Oval, White, 13.4 x 8.93)
- 12ct Diamond (Oval, White, 18.59 x 12.39) vs. 15ct Diamond (Oval, White, 20.01 x 13.34)
- 12ct Diamond (Oval, White, 18.59 x 12.39) vs. 11ct Sapphire (Oval, Blue, 16.82 x 11.21)
- 12ct Diamond (Oval, White, 18.59 x 12.39) vs. 15ct Emerald (Emerald, Green, 16.88 x 11.83)
- 12ct Diamond (Oval, White, 18.59 x 12.39) vs. 4.5ct Diamond (Oval, White, 11 x 9)